As per my introduction, I suffer permanent effects to my cognition from cannabis consumption as an adolescent. This was before I ever took SSRIs. Cannabis consumption in adolescence affects the GABAa receptors https://www.nature.com/articles/s41598-017-11645-8

If effects on GABAa through SSRI consumption plays a role in PSSD, is it possible that I made myself more susceptible to PSSD through the previous impact of cannabis on GABAa?